27 lines
704 B
Markdown
27 lines
704 B
Markdown
---
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title: Disjointed iterables
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tags: array
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expertise: intermediate
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author: maciv
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cover: blog_images/interior-9.jpg
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firstSeen: 2020-10-11T11:53:01+03:00
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lastUpdated: 2020-10-11T11:53:01+03:00
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---
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Checks if the two iterables are disjointed (have no common values).
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- Use the `Set` constructor to create a new `Set` object from each iterable.
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- Use `Array.prototype.every()` and `Set.prototype.has()` to check that the two iterables have no common values.
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```js
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const isDisjoint = (a, b) => {
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const sA = new Set(a), sB = new Set(b);
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return [...sA].every(v => !sB.has(v));
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};
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```
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```js
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isDisjoint(new Set([1, 2]), new Set([3, 4])); // true
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isDisjoint(new Set([1, 2]), new Set([1, 3])); // false
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```
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